Affects Version/s: Minecraft 1.4.2
Fix Version/s: None
Environment:Windows 7 x86
Put the summary of the bug you're having here
What I expected to happen was...:
Wither Skull placed on bookshelf in my house was fine for a week or so.
What actually happened was...:
walked into room today after coming from another chunk and wither skull had been changed into a skeleton head, and was slighty turned more than before.
Steps to Reproduce:
No way to reproduce.
This was on a vanilla SMP server. Also, I noticed at the time of this happening all signs in said chunk were blank also.